I purchased this product from a friends suggestion that Alpha Lipoic acid may help my taste and smell which had been altered due to covid (research yourself) and I have to say in my personal experience that it has proved extremely effective in improving both my taste and smell .. but let me also state I am not a medical professional and whatever additional disclaimer I have to put here so that people don’t blame,whine or complain about how it didn’t work for them to this company ...this is just my personal experience and I am grateful.